Politics is the art of associating (consociandi) men for the purpose of establishing, cultivating, and conserving social life among them. Whence it is called “symbiotics.” The subject matter of politics is therefore association (consociatio), in which the symbiotes pledge themselves each to the other, by explicit or tacit agreement, to mutual communication of whatever is useful and necessary for the harmonious exercise of social life. (Johannes Althusius, Politica, Chap.Ⅰ)